Fix most warnings and remove some unused code

Cargo.toml

@@ -29,4 +29,3 @@ members = [
 ]
 
 [workspace.dependencies]
-lazy_static = "1.4.0"

qu/Cargo.toml

@@ -31,10 +31,9 @@ edition = "2021"
 
 
 [dependencies]
-lazy_static = { workspace = true }
 
 [dev-dependencies]
-criterion = "0.4.0"
+criterion = "0.5.1"
 
 [features]
 qu_panic_upon_error = []

qu/benches/vm_benchmark.rs

@@ -5,21 +5,8 @@ use criterion::criterion_group;
 use criterion::criterion_main;
 use criterion::Criterion;
 
-use qu::Qu;
-use qu::QuCompiler;
-use qu::QuMsg;
-use qu::QuOp;
-use qu::QuStackId;
 
-
-fn speed(c: &mut Criterion) {
-	let mut qu = Qu::new();
-
-	let n1:QuStackId = 0.into();
-	let nterms:QuStackId = 1.into();
-	let n2:QuStackId = 2.into();
-	let count:QuStackId = 3.into();
-	let zero:QuStackId = 20.into();
+fn speed(_c: &mut Criterion) {
 }